The mum-of-two was found not far from her car late on Wednesday by a member of the public, four days after she set out on a run near Mount Nameless. She had a hydration pack with her.

She texted her family just before 1pm on Sunday telling them she'd be home in 20 minutes but never returned.

The Shadbolt family reported her missing when she failed to come home and police and volunteers kicked off a massive search effort, battling days of scorching heat to try to find the mum after discovering her car at the bottom of the mountain.

Police attempted to triangulate the phone's location using the local mobile tower but said the area pinpointed was too broad. Calls to Ms Shadbolt were ringing out until early Monday morning.

The ground and aerial search covered more than 70,000 hectares and included local community volunteers, drones and Pony Club members on horseback.

SES volunteers worked in the desert to find clues. Picture: WA Police

Police were forced to temporarily suspend the search when temperatures soared above 40C and thunderstorms lashed the area.

But on Wednesday night their worst fears were realised when someone found the 36-year-old's body less than 500m away from the Tom Price caravan park.

Ms Shadbolt's family have been assisting police with the search, with her mother and older sister flying to the mining town on Tuesday.